The present invention relates to a black box system for a leisure vessel and, more particularly, to a black box system for a leisure vessel which has a marine black box to interface a GPS receiving unit with various kinds of navigation data measuring devices and a camera unit, thereby checking problems in the vessel in real time, and which executes information stored in a portable memory with a marine black box application via a smart terminal to output the information on a display screen and to simultaneously store images and data at the time of an accident in a data storage server provided on land, thereby increasing portability and analyzing navigation data and images for a vessel when the vessel has been lost due to an unexpected accident.